x = list(map(float, input().split(' ')))
ans = pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5)
print("{0:.8f}".format(ans)) x = list(map(float, input().split(' '))) x list(map(float, input().split(' '))) list map(float, input().split(' ')) map float input().split(' ') ().split () input split ' ' ans = pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5) ans pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5) pow pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2) pow(x[0]-x[2], 2) pow x[0]-x[2] x[0] x 0 x[2] x 2 2 pow(x[1]-x[3], 2) pow x[1]-x[3] x[1] x 1 x[3] x 3 2 0.5 print("{0:.8f}".format(ans)) print "{0:.8f}".format(ans) "{0:.8f}".format "{0:.8f}" format ans x = list(map(float, input().split(' '))) list(map(float, input().split(' '))) x ans = pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5) pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5) ans
x = list(map(float, input().split(' ')))
ans = pow((pow(x[0]-x[2], 2) + pow(x[1]-x[3], 2)), 0.5)
print("{0:.8f}".format(ans))
